Jack shore



Nav. 2s, 1944.

YLAL

D. c. sco'rT JACK SHORE Filed may 2o, 194s f .afcazz v INVENTOR.

\ the` movable `member `of the jack. `It

l tion.

Pafentednov. ze, 1944 inthe building of a vessje1`,it isoustdmary to holdfthe bilge plates "inpplace an Vilrlczlined Jack; the body whereof has the` xo osoavailable support andfoothold, a shore orprop beinginteposed between thebilgeplate and thefend of a a frequently hafpbens that the structure including arid the shorewill fold orlbreak laterallyeftthe place of engagement `betvieen the lower end of theshore'and the upperend of the movable, part CTfhef elf-i1 l pffthe mais. iniuryiofoperators and consequences, resulting, especially in view of the facytthatthewweight of the bilge plate maybe `so 'much as two "or three tons. Even though the plate may remainY in place (being held by other jacks), the` failingjack `and the corresponding shore are flung aside with a force approaching that of a projectile. 1 l

In view of the foregoing, the present invention aims, broadly speaking, to `provide novel means for holding the jack and the shore in axial alinement and against folding; to supply an ade- `quate foothold for said means; and to permit the jack and the shore` to be swung upwardly and `downwardly lfor `vertical adjustment as one.`

piece, itbeing unnecessary for `an operator to give a divided attention to the position of the jack, and to theposition of the` shore relativel to thejack and the bilge plate. l

Itis within 'the province of the disclosure to a `improve generally `and to enhance the` utility of devices of that type to which the present invention appertains. l

With the above and other `objects `in View, `which will appearasthe `description proceeds,

the invention resides inthe combination and ar rangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment 'of the invention herein disclosed,

, may be made within the scope of what is claimed,

without departing from the spirit of the inven- In the accompanying drawing:` a l 1 Fig. 1 shows in Iside elevation, a, device constructed in accordance with the invention; Fig. 2 is an elevation wherein the deviceis` viewed at right angles to the `showing of Fig. 1; Fig. 3 is a transverse section on the line 3-3 of Fig. 1;` l a Fig; 4 isa vertical section taken through the support.

`The adjustable prop forming the subject mat- ,etalfthrouglioutj asidefrnl VS, which mayor may'not be formed of metal.

j The .om of the wie w whicmherffga character A sapples in Fig-L l `will be @asdr ered, the` forward, part, descriptive terms being,

ofthe ribs `2 are marked by, the rferei'lcefnumerel, 3 ,eind are@ ghtxangls "tothe lower may affinite a. ffmlhffld` @whe ground, The

plate carries nx'ed, opstanding nig; 4; soo-L plied in its upper surface with a transverse notch orseat5. i

The letter G` marks an elongated, troughshaped guide which, for lightness, and convenience in manufacture, may comprise oppositelydisposed angle members 6, thebasefor rearo angesof which are spaced apart as shown at 1. a

At `their rear ends, and intermediate their f ends, the angle members 6 yof the guide G are held together, and in` spaced relation, by U-shaped yokes 8, which -project forwardly beyond the forwardly presented, side flanges of the angle members. In the forward ends of thev yokes `8, headed pins 9 are mounted, and are held in placeby cotter pins I 0. The pins 9 `may havea rotary movement in the yokes` 8, to facili- ,l

tate the longitudinal movement of the shore S,

hereinafter mentioned, l

`At their lower ends, the forwardly presented flanges of the guide G are broadened, as shown at I9 in Fig. l, and are connected by a foot i Il, having ears l2, located on opposite sides of the lug 4 of the base plate l. `A pivot pin lli or the like is mounted in the ears `l2 and has rocking movement in theseat 5 of the lug 4. l

A partitionl, spaced from the foot Il, is welded at 2i, or secured otherwise, in the constituent members G ofthe guide `G and projects ter of this application preferably is made of '55 bers.

forwardly beyond the side flanges of thoseI meme In the forward edge of the partition l5, a notch or opening Nilis formed.

`The shore S is "received for longitudinal ad! justment in the guide G, to the rear of the pins 9, and finds an abutment against thepartition` l5, at the lower end of theshore. The height of the side anges of the angle members 6 is less than the corresponding dimensions of the shore The numeral I8 marks a jack, of any desired construction, the jack being shown as being operated by a handle 2U, `although the particular operating means for "the jack is of no consequence. The lower end of the jack rests against the foot II of the guide G, and the movable member oi the jack extends through the notch I6 in the partition I5 of the guide G, the movable member of the jack engaging the lower surface of the shore 8. The partition I5 and the foot II form a jack-receiving chamber of xed length. The broadening of the side walls of the guide G shown at I9, aids in holding the jack removable in 'place within the guide. The upper or rear end of the shore S engages the vbilge plate I'I of a vessel, to hold the bilge plate in place. l

The ribs 2 on the base plate I get a good hold on the ground. By operating the jack I8, theV shore S is advanced with respectA to the bilgev plate I'I, the shore moving away-from the-abutment or partition I5, under the actuation of the movable member of the jack I8.

`The shore S is so conned within the guide G'and associated partsthat the structure can not buckle 'orfbreaktransversely, with the .unsatisfactory Aresult'pointed "out 'in the' fore part of specication.` They partition `I5 extends beyondthe free, longitudinal edges'of the angle members 6, to form a shore-storici"approximate- Al'y'the sarneaeaas the lwer'end surface `of the shoresff."mW v,Vl/"h'ile the shoreV S vis intle position shown in Fig. 1,'i`1fc0ntact with the abutment of "partition ISfthefbase plate'l may 'bev advanced to the right i'nFig. `1, 'until contact' between the shore bivlge L )latel l'llisuacquired,v `and then the necessary pressure can be put on the shore, by operating the jack I8.

The partition I5 stops the approach of the shore S toward the foot II of vthe yguide G, and,`

therefore, there is always room enough so that the jack I8 may be slid into place within thev guide,- as shown in Figs. 1 and 2.

Having thus described the invention, what lis claimed is:

In an adjustable prop, ya trough-shaped guide including oppositely-disposed angle ,members each comprising a base flange and a side flange, the inner edges of the base flanges being spaced `apart, a shore longitudinally adjustable in the angle members, the height of the side flanges beingless than the` corresponding dimensions of the shore, 'a foot forming aV connection betweenmthe angle members at their lower ends,

a partition spaced from the foot Vand forming a connection between the angle members and- Y end. surface vof the shore, the partition extend-- ing` beyond-the free, longitudinal 'edges of, the .side flanges, to forma shore-stopof approximatelyv the same area` as the lower end surface of the shore, and a yoke lforming a connection betweenfthe angle members, in spaced relation to theV partition,A the yoke engagingfthe shore to retain it :in` the guide, forvlongitudinavlv adi 

